Let's get several things clear:
There are some new tour vendors that want to attract attention and earn your business. I would like to facilitate having PFRE readers help decide which tour hosting companies they recommend. So I've decided to make a list of tour hosting vendors similar to the outsourcing vendor list where PFRE readers can give feedback on which vendors they like.
Vendors that want to get on the list please contact me directly here. This list is intended only for tour hosting vendors that are designed for independent real estate photographers to use for their clients so many tour vendors don't make sense.